package com.linwankaifa.linwancunyi.util;

import android.animation.TimeInterpolator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.AnimationUtils;

import com.linwankaifa.linwancunyi.R;

/**
 * Created by 邹京汕 on 2019/7/18.
 */


public class CircleProgress extends View {

    private static final int RED = 0xFFE5282C;

    private static final int YELLOW = 0xFF1F909A;

    private static final int BLUE = 0xFFFC9E12;

    private static final int COLOR_NUM = 3;

    private int[] COLORS;

    private TimeInterpolator mInterpolator = new EaseInOutCubicInterpolator();



    private final double DEGREE = Math.PI / 180;

    private Paint mPaint;

    private int mViewSize;

    private int mPointRadius;

    private long mStartTime;

    private long mPlayTime;

    private boolean mStartAnim = false;

    private Point mCenter = new Point();



    private ArcPoint[] mArcPoint;

    private static final int POINT_NUM = 15;

    private static final int DELTA_ANGLE = 360 / POINT_NUM;

    private long mDuration = 3600;



    public CircleProgress(Context context) {

        super(context);

        init(null, 0);

    }



    public CircleProgress(Context context, AttributeSet attrs) {

        super(context, attrs);

        init(attrs, 0);

    }



    public CircleProgress(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle);

        init(attrs, defStyle);

    }



    private void init(AttributeSet attrs, int defStyle) {

        mArcPoint = new ArcPoint[POINT_NUM];



        mPaint = new Paint();

        mPaint.setAntiAlias(true);

        mPaint.setStyle(Paint.Style.FILL);



        TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.CircleProgress, defStyle, 0);

        int color1 = a.getColor(R.styleable.CircleProgress_color1, RED);

        int color2 = a.getColor(R.styleable.CircleProgress_color2, YELLOW);

        int color3 = a.getColor(R.styleable.CircleProgress_color3, BLUE);

        a.recycle();



        COLORS = new int[]{color1, color2, color3};

    }



    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int defaultSize = getResources().getDimensionPixelSize(R.dimen.default_circle_view_size);

        int width = getDefaultSize(defaultSize, widthMeasureSpec);

        int height = getDefaultSize(defaultSize, heightMeasureSpec);

        mViewSize = Math.min(width, height);

        setMeasuredDimension(mViewSize, mViewSize);

        mCenter.set(mViewSize / 2, mViewSize / 2);



        calPoints(1.0f);

    }



    @Override

    protected void onDraw(Canvas canvas) {

        canvas.save();

        canvas.translate(mCenter.x, mCenter.y);



        float factor = getFactor();

        canvas.rotate(36 * factor);

        float x, y;

        for (int i = 0; i < POINT_NUM; ++i) {

            mPaint.setColor(mArcPoint[i].color);

            float itemFactor = getItemFactor(i, factor);

            x = mArcPoint[i].x - 2 * mArcPoint[i].x * itemFactor;

            y = mArcPoint[i].y - 2 * mArcPoint[i].y * itemFactor;

            canvas.drawCircle(x, y, mPointRadius, mPaint);

        }



        canvas.restore();



        if (mStartAnim) {

            postInvalidate();

        }

    }



    private void calPoints(float factor) {

        int radius = (int) (mViewSize / 3 * factor);

        mPointRadius = radius / 12;



        for (int i = 0; i < POINT_NUM; ++i) {

            float x = radius * -(float) Math.sin(DEGREE * DELTA_ANGLE * i);

            float y = radius * -(float) Math.cos(DEGREE * DELTA_ANGLE * i);



            ArcPoint point = new ArcPoint(x, y, COLORS[i % COLOR_NUM]);

            mArcPoint[i] = point;

        }

    }





    private float getFactor() {

        if (mStartAnim) {

            mPlayTime = AnimationUtils.currentAnimationTimeMillis() - mStartTime;

        }

        float factor = mPlayTime / (float) mDuration;

        return factor % 1f;

    }



    private float getItemFactor(int index, float factor) {

        float itemFactor = (factor - 0.66f / POINT_NUM * index) * 3;

        if (itemFactor < 0f) {

            itemFactor = 0f;

        } else if (itemFactor > 1f) {

            itemFactor = 1f;

        }

        return mInterpolator.getInterpolation(itemFactor);

    }



    public void startAnim() {

        mPlayTime = mPlayTime % mDuration;

        mStartTime = AnimationUtils.currentAnimationTimeMillis() - mPlayTime;

        mStartAnim = true;

        postInvalidate();

    }



    public void reset() {

        stopAnim();

        mPlayTime = 0;

        postInvalidate();



    }



    public void stopAnim() {

        mStartAnim = false;

    }



    public void setInterpolator(TimeInterpolator interpolator) {

        mInterpolator = interpolator;

    }



    public void setDuration(long duration) {

        mDuration = duration;

    }



    public void setRadius(float factor) {

        stopAnim();

        calPoints(factor);

        startAnim();

    }



    static class ArcPoint {

        float x;

        float y;

        int color;



        ArcPoint(float x, float y, int color) {

            this.x = x;

            this.y = y;

            this.color = color;

        }

    }

}

